2026 NPPES data Gynecologic Oncology Physician NPI 1841459948 M.D.
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FONG LIU, M.D.

Gynecologic Oncology Physician in TOWSON, Maryland. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
180
Medicare Part D claims · 37 beneficiaries · Gynecologic Oncology Physician avg: 188
Generic prescribing
73%
generic claims · 27% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$76.34
3 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: FONG LIU, M.D. is a Gynecologic Oncology Physician ([object Object]) practicing in TOWSON, Maryland with a Medicare Part D prescribing footprint of 180 claims across 37 beneficiaries — 27% brand-name prescribing . Industry payments of $76.34 across 3 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: FONG LIU, M.D. filed 180 Medicare Part D claims in 2023 across TOWSON, Maryland. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

FONG LIU, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

FONG LIU, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 06/03/2008

NPI 1841459948

Primary specialty

Gynecologic Oncology Physician

Niche

1,360 US NPIs in this specialty

Medicare Part D claims

180 4% vs specialty avg

2023 prescription claims

Specialty avg: 188

Specialty distribution in Maryland

How Gynecologic Oncology Physician compares to other specialties among Maryland providers

Maryland providers

Gynecologic Oncology Physician share within Maryland

1. Gynecologic Oncology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Gynecologic Oncology Physician share within Maryland

Specialty board-certification context

Estimated specialty board-certified rate — Gynecologic Oncology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Gynecologic Oncology Physician ABMS/AOA estimate

Est. board-certified rate (Gynecologic Oncology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Gynecologic Oncology Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

FONG LIU, M.D. is a Gynecologic Oncology Physician provider practicing in TOWSON, Maryland, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1841459948. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

FONG LIU, M.D. appears in the CMS NPPES registry as a Gynecologic Oncology Physician provider holding M.D. credentials at 6569 N CHARLES ST STE 306, TOWSON, MD, 21204, with a listed phone of (443) 849-2765. NPI 1841459948 was issued on 06/03/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LIU most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 180 prescription claims written by this provider, covering 37 Medicare beneficiaries and totaling roughly $350K in drug spend, split 27% brand-name and 73% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Gynecologic Oncology Physician is a narrow specialty nationwide, with 1,360 enrolled providers across 49 states and an average of 188 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

6569 N CHARLES ST STE 306
TOWSON, MD 21204

Provider Details

NPI 1841459948
Specialty Gynecologic Oncology Physician
Credentials M.D.
Gender Female
NPI Issued 06/03/2008

Hospital and facility affiliations

Facilities where FONG LIU, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

GREATER BALTIMORE MEDICAL CENTER INC
BALTIMORE, MD
JOHNS HOPKINS UNIVERSITY
LUTHERVILLE, MD

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for FONG LIU, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$76

Largest payer

ABBVIE INC.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Above average

FONG LIU, M.D. — brand share 27.0%
Specialty average (est.)

27% brand-name claims vs 73% generic, on 180 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

180
Total Claims
$350K
Total Drug Cost
37
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
203
Total Day Supply
4,512
Brand vs Generic
27% brand / 73% generic
Brand Drug Cost
$348K
Generic Drug Cost
$2K
Antibiotic Claims
12

Patient Demographics

Average Patient Age
72.6 years
Avg HCC Risk Score
1.65
Gender Split
100% female / 0% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Lynparza
Olaparib
18
Prochlorperazine Maleate
17
Lidocaine-Prilocaine
Lidocaine/Prilocaine
16
Famotidine
14
Dexamethasone
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Gynecologic Oncology Physician Overview

How FONG LIU, M.D. fits within the Gynecologic Oncology Physician landscape nationally.

1,360
Gynecologic Oncology Physician Providers in US
49
States with Gynecologic Oncology Physician
188
Avg Claims per Provider

FONG LIU, M.D.'s 180 claims are below the specialty average of 188.

Nearby Gynecologic Oncology Physician Providers in Maryland

Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as LIU.

Compare Gynecologic Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is FONG LIU, M.D.'s specialty?
FONG LIU, M.D. specializes in Gynecologic Oncology Physician and practices in TOWSON, Maryland. Credentials: M.D..
How much does FONG LIU, M.D. prescribe under Medicare Part D?
In 2023, FONG LIU, M.D. wrote 180 Medicare Part D claims totaling $350K in drug costs for 37 beneficiaries.
Where is FONG LIU, M.D. located?
FONG LIU, M.D. is located at 6569 N CHARLES ST STE 306, TOWSON, MD, 21204. Phone: (443) 849-2765.
What is FONG LIU, M.D.'s NPI number?
FONG LIU, M.D.'s National Provider Identifier (NPI) is 1841459948, issued on 06/03/2008.
Does FONG LIU, M.D. prescribe more brand-name or generic drugs?
FONG LIU, M.D.'s prescribing is 27% brand-name and 73% generic drugs by claim count, with $348K in brand drug costs.
How many Gynecologic Oncology Physician providers are there in the US?
There are 1,360 Gynecologic Oncology Physician providers across 49 states in the US. The average Gynecologic Oncology Physician provider writes 188 Medicare Part D claims per year.
What drugs does FONG LIU, M.D. prescribe most often?
Based on 2023 Medicare Part D data, FONG LIU, M.D.'s most frequently prescribed drugs include Lynparza, Prochlorperazine Maleate, Lidocaine-Prilocaine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does FONG LIU, M.D. accept Medicare?
FONG LIU, M.D. appears in CMS Medicare data with 180 Part D claims and 37 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify FONG LIU, M.D.'s credentials?
FONG LIU, M.D.'s NPI is 1841459948 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology